Well you're right... I don't really have any evidence to back that up. I just pretty much repeated things I've read and heard from others. Of course I don't like admitting this, but 'blowing hot air' doesn't help anyone. I say this because there are many others on this forum who do this as well and in the end it just clouds the air instead of clearing it. I apologize for saying anything untrue...
I just figured one would want extra peace-of-mind running high cylinder pressures from a supercharger. And the aftermarket R blocks are just better suited to ultra-high-performance forced induction duty than 30+-year-old factory pass.-car and truck 360 blocks that weren't really designed to house 4" cranks and boost. Plus I've got this strange desire for high-revving NASCAR engines, and I just like using as many of those components as possible to say I did LOL...